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Distribution Customer Connection Requirements
2 January 2020
Original Issue: May 2019
Content Owner/Custodian: Distribution Grid Strategy
This Revision: Third – January 2020
Date for Next Review: January 2025
© Western Power
ABN 18540492861
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Page 1Distribution Customer Connection Requirements Third Edition January 2020
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EDM 43517326 Page 2Distribution Customer Connection Requirements Third Edition January 2020
Document release information
Client Distribution Grid Strategy
Project name Network Asset Public Technical Document
Document number 43517326 Word - 48688244 PDF
Document title Distribution Customer Connection Requirements
Revision status Third Edition (3rd)
Revision history
Edition/revision Issue date Description Endorsed by Approved by
number
Initial 1 May 2019 Original B Bristow M Cheney
Version 2 30 Aug 2019 Amended drawings: B Bristow M Cheney
1-00-1; 1-05-01; 1-05-1n; 1-05-2; 1-05-3; 1-06-3:
Amended drawings
Version 3 2 Jan 2020 N Kirby B Bristow
1-05-1, 1-05-3, 1-05-4, 1-05-5, 1-07-N
An appropriate citation for this paper is:
Distribution Customer Connection Requirements
Western Power
363 Wellington Street
Perth WA 6000
GPO Box L921 Perth WA 6842
T: 13 10 87 | Fax: 08 9225 2660
TTY 1800 13 13 51 | TIS 13 14 50
Electricity Networks Corporation
ABN 18 540 492 861
westernpower.com.au
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EDM 43517326 Page 4Distribution Customer Connection Requirements Third Edition January 2020
FOREWORD
This Third edition of the WA Distribution Customer Connection Requirements (DCCR) is a revised and updated
version of the now superseded Introduction, Sections One and Two of the Distribution Substation Manual
(DSM)
The document details network arrangements for both customer connections and the interconnection of
substations to Western Power’s LV/HV distribution network within the South West Interconnected Network
(SWIN).
These requirements do not contain detailed information on the practices, processes and procedures
associated with the design, construction, installation, connection, energisation or operation of depicted
infrastructure, network equipment or connection arrangements.
For specific information pertaining to infrastructure or network equipment, please refer one of the following
network publications or go to Western Power’s public website for the complete range of publicity listed
documents:
• Distribution Construction Standards Handbook. (DCSH)
• Distribution Substation Plant Manual. (Previously known as DSM Sections 3 to 9).
• Network Integration Guideline. (NIG)
• Underground Distribution Schemes Manual. (UDS)
• Underground Cable Installation Manual. (UCIM)
• Western Australian Distribution Connections Manual. (WADCM)
• Western Australian Electrical Requirements. (WAER)
The content of these documents, together with Western Powers detailed design requirements, form the key
network elements in the process of communicating Western Power’s network connection and supply
arrangement requirements to customers, industry and related network design, construction and operational
personnel.
With the introduction of this document and transition to Distribution Substation Plant Manual, additional
work has been initiated to review and further define the appropriate levels of AS-5577 compliance. During
this interim period, readers should reference the Distribution Substation Plant Manual and the WA
Distribution Connections Manual for current requirements and practices.
Western Power acknowledges the valuable support and contribution made during the development of this
document by officers and personnel from both industry and Western Power.
Feedback on any aspect of the document is encouraged, welcomed and valued. Western Power looks
forward to your continued support and involvement in the future development of new editions of the
Distribution Customer Connection Requirements.
Ben Bristow
Head of Grid Transformation
Western Power
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Contents
1. Disclaimer ............................................................................................................................................8
2. Document ownership and administration ............................................................................................8
3. Application ...........................................................................................................................................8
3.1 Application date ......................................................................................................................... 8
4. Introduction .........................................................................................................................................9
5. Scope....................................................................................................................................................9
5.1 In scope ..................................................................................................................................... 9
5.1.1 Section 8 drawings.......................................................................................... 10
5.1.2 Section 9 drawings.......................................................................................... 10
5.2 Out of scope ............................................................................................................................ 10
6. Compliance with these requirements ................................................................................................ 10
7. Definitions.......................................................................................................................................... 10
8. Customer connections........................................................................................................................ 11
8.1 Arrangement drawings............................................................................................................. 11
8.1.1 Drawing index ................................................................................................ 11
8.1.2 Drawing revision list ....................................................................................... 12
8.1.3 Drawing legend .............................................................................................. 13
8.1.4 Fuse charts ..................................................................................................... 14
8.1.5 LV District substations .................................................................................... 17
8.1.6 LV Sole use connections .................................................................................. 24
8.1.7 HV Connected customer owned substations .................................................... 29
9. HV Network arrangements................................................................................................................. 36
9.1 Planning philosophies .............................................................................................................. 36
9.1.1 General .......................................................................................................... 36
9.1.2 6.6 KV philosophy ........................................................................................... 36
9.1.3 11 KV philosophy ............................................................................................ 36
9.1.4 22 KV philosophy ............................................................................................ 37
9.1.5 33 KV philosophy ............................................................................................ 37
9.2 Design notes ............................................................................................................................ 37
9.2.1 Note 1............................................................................................................ 37
9.2.2 Note 2............................................................................................................ 38
9.2.3 Note 3............................................................................................................ 38
9.2.4 Note 4............................................................................................................ 38
EDM 43517326 Page 6Distribution Customer Connection Requirements Third Edition January 2020
9.2.5 Note 5............................................................................................................ 38
9.2.6 Note 6............................................................................................................ 39
9.2.7 Note 7............................................................................................................ 39
9.2.8 Note 8............................................................................................................ 39
9.2.9 Note 9............................................................................................................ 39
9.2.10 Note 10 .......................................................................................................... 39
9.2.11 Note 11 .......................................................................................................... 39
9.2.12 Note 12 .......................................................................................................... 39
9.2.13 Note 13 .......................................................................................................... 39
9.3 HV Network arrangement drawings ......................................................................................... 40
9.3.1 Drawing index ................................................................................................ 40
9.3.2 Drawing revision list ....................................................................................... 41
9.3.3 Drawing legend .............................................................................................. 42
9.3.4 Overhead district and sole use ........................................................................ 43
9.3.5 Overhead customer owned ............................................................................. 54
9.3.6 Underground district and sole use ................................................................... 64
9.3.7 Underground customer owned ........................................................................ 72
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Page 7 of 78Distribution Customer Connection Requirements Third Edition January 2020 1. Disclaimer These requirements have been compiled and published by Western Power using definitions, drawings, guidelines, standards, and network information consistent with the relevant Acts and Regulations of the state of Western Australia at the date of publication. Users are responsible for determining the relevance and applicability of that material, to their specific circumstance. Legislation, standards and electricity industry publications are revised periodically. Consequently this document may at times require amendment therefore users must make their own inquiries to ensure compliance. 2. Document ownership and administration This document is the property of the copyright owner, being Electricity Networks Corporation trading as Western Power, who reserves the right to develop, revise, administer and or publish amended content, as deemed appropriate. 3. Application This edition supersedes all previous versions of the Introduction, Sections One and Two of the Distribution Substation Manual (DSM) and any previous versions of this document. The application of the information contained within this document and subsequent amendments are not retrospective unless an existing connection, network arrangement, electrical installation or part thereof is altered, modified, upgraded or constitutes a safety issue as determined by an authorised inspector under the Energy Coordination Act 1994. These requirements are to be applied to all electrical connections and installations as soon as practical, during the six month period directly following the date of publication, after which time these requirements are deemed to be mandatory. Specific substation installation, operational or technical detail should be sourced from the DSPM and the WADCM manuals accessible via Western power’s public website. Where work on an electrical connection, installation or network arrangement, has commenced or formal contracts to undertake electrical work were signed prior to the publication of these requirements, Western Power may grant an exemption from these requirements on receipt of an appropriate application. Where an exemption is granted the electrical work is to be completed in accordance with the previously published DSM requirements. An exemption will not be granted where there is a safety issue or concern. Additionally, there may be connection requirements, configurations or unusual situations that cannot be or have not been covered by these requirements. In such circumstances Western Power must be advised and consulted before any design or installation work commences. 3.1 Application date These requirements shall apply from the date shown in the “Record of revisions” located at the front of the document. EDM 43517326 Page 8
Distribution Customer Connection Requirements Third Edition January 2020
4. Introduction
These requirements have been developed to promote, support and complement the documents listed within
the scope, through specific references to the design of the customer connection arrangement at the point of
supply (PoS).
This document, contains diagrams showing, standard connection arrangements for Low voltage (LV) and High
voltage (HV) customers to Western Power’s distribution network within the South West Interconnected
Network (SWIN). These diagrams form the framework for both customer and network designers when
selecting an appropriate customer connection.
Each connection arrangement and its supporting network infrastructure must be selected, designed and
installed to ensure that:
The integrity and safety of the network together with the customer’s installation is not compromised;
Network capacity limits are not exceeded;
The customers load and generation expectations are taken into consideration; and
Other users of the surrounding network either directly or indirectly are not adversely affected or put
at risk.
Connection arrangements may be either for a discrete customer (e.g., a single residential, commercial or
industrial connection) or an arrangement for a number of new customers (e.g. multi- residential/commercial
customers or subdivision).
5. Scope
5.1 In scope
These requirements are to be applied to all new, altered or modified connections to the SWIN at distribution
voltages including both low voltage (LV) and high voltage (HV) up to and including 33 kV. The content is to
be read in conjunction with but not limited to:
Applicable Federal, State and Local Legislation, and Codes.
Documents as published by Building and Energy (formerly EnergySafety) including:
- Guidelines for the safe management of High voltage electrical installations;
- Western Australian Electrical Requirements (WAER).
Industry standards as published by Standards Australia including:
- AS 2067: Substations and high voltage installations exceeding 1 kV a.c.;
- AS/NZS 3000: Wiring rules;
- AS 4777 series.
Documents as published by Western Power including:
- Distribution Construction Standards Handbook (DCSH);
- Distribution Design Catalogue (DDC);
- Distribution Substation Plant Manual (DSPM)
- Network Integration Guideline – Inverter Embedded Generation (NIG);
- Distribution Overhead Line Design Manual. (LDM) (Network only access)
- Underground Distribution Schemes Manual (UDS);
- Technical Rules;
- Western Australian Distribution Connections Manual (WADCM).
Other related network standards as outlined in this document which may specify minimum
requirements for a customer supply arrangement or connection.
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Page 9 of 78Distribution Customer Connection Requirements Third Edition January 2020
In connecting a customer, over and above compliance with the identified technical standards, the designer
of the customer connection arrangement shall demonstrate due diligence with safety in design principles as
prescribed by Western Power and the Occupational Safety and Health (OS&H) legislation.
5.1.1 Section 8 drawings
This Section contains drawings showing standard arrangements for the connection of LV or HV customers to
the network and associated distribution substation. The intent of these drawings is to assist designers to
select the correct method for connection of a customer.
5.1.2 Section 9 drawings
This Section contains drawings showing standard arrangements for the interconnection of a distribution
substation with the HV network. As with Section 8 the intent of these drawings is to assist designers with
the selection of the appropriate substation arrangement and connection methodology to the HV network.
5.2 Out of scope
It is intended that the DCCR will be progressively updated to cover other aspects of the connection
relationship between the distribution network and the customer. This edition of the requirements, does not
currently include, but may in future, cover specific detail on network requirements associated with one or
more of the following:
Metering and Service equipment connections;
Overhead connection and supply arrangements for both metropolitan and rural networks;
Standalone Power Supply (SPS) supply and connection arrangements;
Inverter and Battery (IES) connection arrangements;
Emergency Response Generation (ERG) connection arrangements;
Private Power Generation (PPG) connection arrangements;
Neutral Voltage Displacement (NVD) – LV connection arrangements;
Single Phase Overhead and Underground Distribution connection arrangements.
6. Compliance with these requirements
It is the responsibility of the customer to operate and maintain (or ensure their authorised representatives,
operate and maintain) their electrical infrastructure and equipment forming a part of their respective
facilities in accordance with both regulatory and network requirements.
Western Power will not connect a non-compliant or, where aware, permit a non-compliant connection to
remain connected to the distribution network until such time as that connection or electrical installation is
rectified and made compliant by the customer.
Re-inspection of the customer’s electrical connection/installation may be required for reasons of safety or
non-compliance or both. In such cases a re-inspection fee may be applied.
7. Definitions
These requirements use standard industry terminology wherever possible to align the document’s language
with that used in legislation, frequently referenced industry and network publications. In addition to the
documented Legends, common definitions and phrases have been drawn from the WADCM.
EDM 43517326 Page 10Distribution Customer Connection Requirements Third Edition January 2020
8. Customer connections
8.1 Arrangement drawings
8.1.1 Drawing index
DCCR Section 8 Title
General
DCCR 1-00-1 Legend
DCCR 1-00-2 Transformer and LV Feeder Overhead Fusing Type EDO & FT
DCCR 1-00-3 Transformer and LV Feeder Ground Mounted Fusing Type Air HRC
DCCR 1-00-4 Isolation Transformer Overhead and RMU Fusing Type EDO, FT and Air HRC
DCCR 1-01
DCCR 1-02
Reserved for future content
DCCR 1-03
DCCR 1-04
LV District Substations
DCCR 1-05-1 LV Loads below 315 A - Shared LV Street Circuits
DCCR 1-05-1a Reserved for future content
DCCR 1-05-1N Drawing Notes for DCCR 1-05-1 -
DCCR 1-05-2 MPS LV Loads up to 315 A - Dedicated LV Street Circuit
DCCR 1-05-3 MPS LV Loads up to 630 A - Dedicated LV Street Circuit
DCCR 1-05-4 Non MPS LV Loads up to 1310 A - Dedicated LV Street Circuit
DCCR 1-05-5 Non MPS LV Loads up to 2000 A/2500 A - Dedicated LV Street Circuit
DCCR 1-05-N Drawing Notes for DCCR 1-05-2 to 1-05-5
LV Sole Use Substations
DCCR 1-06-1 Reserved for future content
DCCR 1-06-2 LV Load up to 82 A 3Ø - Underground - Dedicated Transformer
DCCR 1-06-3 LV Load up to 1310 A 3Ø - Underground - Dedicated Transformer
DCCR 1-06-4 LV Load up to 2625 A 3Ø - Underground - Dedicated Transformers
DCCR 1-06-5 LV Load up to 5250 A 3Ø - Underground - Dedicated Transformers
DCCR 1-06-N Drawing Notes to DCCR 1-06-2 to 1-06-5
HV Connected Customer Owned Substations
DCCR 1-07-1a HV Metering - Overhead Pole Mounted Outdoor
DCCR 1-07-1b HV Metering - Ground Mounted Outdoor
DCCR 1-07-2 HV Metering - Ground Mounted Outdoor
DCCR 1-07-3 HV Metering - Ground Mounted Indoor Cable Connected
DCCR 1-07-4 HV Metering - Ground Mounted Indoor – (with generation)
DCCR 1-07-5 HV Metering - Ground Mounted Indoor – (with generation) - (alternative)
DCCR 1-07-N Drawing Notes to DCCR 1-07-1 to 1-07-5
DCCR 1-08
Reserved for future content
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8.1.2 Drawing revision list
DSM
DCCR Section 8 Title
Section 1
General
DSM 1-01 sht 1 of 1 DCCR 1-00-1 Legend
DSM 1-02 sht 1 of 3 DCCR 1-00-2 Transformer and LV Feeder Overhead Fusing Type EDO & FT
Transformer and LV Feeder Ground Mounted Fusing Type
DSM 1-02 sht 2 of 3 DCCR 1-00-3
Air HRC
Isolation Transformer Overhead and RMU Fusing Type EDO,
DSM 1-02 sht 3 of 3 DCCR 1-00-4
FT and Air HRC
LV District Substations
DSM 1-03 sht 1 of 2 DCCR 1-05-1 LV Loads below 315 A - Shared LV Street Circuits
DCCR 1-05-1a 100kW Community PowerBank connection
DSM 1-03 sht 2 of 2 DCCR 1-05-1N Drawing Notes for DCCR 1-05-1
DSM 1-04 sht 1 of 2 DCCR 1-05-2 MPS LV Loads up to 315 A - Dedicated LV Street Circuit
DSM 1-04 sht 2 of 2 DCCR 1-05-3 MPS LV Loads up to 630 A - Dedicated LV Street Circuit
DSM 1-05 sht 1 of 1 DCCR 1-05-4 Non MPS LV Loads up to 1310 A - Dedicated LV Street Circuit
Non MPS LV Loads up to 2000 A/2500 A - Dedicated LV
DSM 1-06 sht 1 of 1 DCCR 1-05-5
Street Circuit
DCCR 1-05-N Drawing Notes for DCCR 1-05-2 to 1-05-5
LV Sole Use Substations
LV Load up to 82 A 3Ø - Underground - Dedicated
DCCR 1-06-2
Transformer
DSM 1-07 sht 1 of 1
LV Load up to 1310 A 3Ø - Underground - Dedicated
DCCR 1-06-3
Transformer
LV Load up to 2625 A 3Ø - Underground - Dedicated
DSM 1-08 sht 1 of 1 DCCR 1-06-4
Transformers
LV Load up to 5250 A 3Ø - Underground - Dedicated
DSM 1-09 sht 1 of 1 DCCR 1-06-5
Transformers
DCCR 1-06-N Drawing Notes to DCCR 1-06-2 to 1-06-5
HV Connected Customer Owned Substations
DCCR 1-07-1 a HV Metering - Overhead Pole Mounted Outdoor
DSM 1-10 sht 1 of 6
DCCR 1-07-1 b HV Metering - Ground Mounted Outdoor
DSM 1-10 sht 2 of 6 DCCR 1-07-2 HV Metering - Ground Mounted Outdoor
DSM 1-10 sht 3 of 6 Withdrawn
DSM 1-10 sht 4 of 6 DCCR 1-07-3 HV Metering - Ground Mounted Indoor Cable connected
DSM 1-10 sht 5 of 6 DCCR 1-07-4 HV Metering - Ground Mounted Indoor – (with generation)
HV Metering - Ground Mounted Indoor – (with generation) -
DSM 1-10 sht 6 of 6 DCCR 1-07-5
(alternative)
DCCR 1-07-N Drawing Notes to DCCR 1-07-1 to 1-07-5
EDM 43517326 Page 12Distribution Customer Connection Requirements Third Edition January 2020
8.1.3 Drawing legend
kWH Whole Current (direct connected) Meter (non CT)
kWH LV Current Transformer Meter (LV CT)
kWH HV Current Transformer Metering Unit (HV CT)
A
MD Maximum Demand Meter
Links (Removable)
Connection Block
Fuse
Circuit Breaker (CB)
Combination Fuse Switch
LV Links or HV / LV load Disconnector
Drop Out Fuse (DOF)
Pole Top Switch
Inverter
B
Battery
G Generator
Transformer (Tx)
Cable Termination to Network Assets Including Switchgear or Transformer
Cable Termination to Overhead Network
CB Circuit Breaker MPD Meter Protection Device (Meter Fuse)
CFS Combination Fuse / Switch MCB Mains Connection Box
CP Connection Point MPS Modular Package Substation
CMS Customer Main Switch MSB Main Switchboard
CPS Customer Paralleling Switch MS Main Switch
CPR Customer Protection Relay MTG Maximum Total Generation
CT Current Transformer MTL Maximum Total Load
DB Customer Distribution Board Neutral Conductor
Earth Connection NOP Normally Open Point
FSD Fuse Switch Disconnect PoS Point of Supply
GMS Generator Main Switch PCC Point of Common Coupling
HV High Voltage SMSB Site Main Switch Board
LU xx Distribution Design Catalogue Reference SPD Service Protection Device
Drawings to be read in conjunction with applicable Legislation, Industry Standards, Codes, the WAER and WADCM
Date # Aug 2019
Rev # Initial
Distribution Customer Legend
Connection Requirements Sheet # 1 of 1
EDM 435 17 326 Draw # DCCR 1-00-1
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8.1.4 Fuse charts
Overhead Fusing
Expulsion Fault Tamer LV HRC
Transformer
Dropout Standard Speed fuse
LV Max
Size EDO Fuselink FT Fuselink
Voltage Fuse Rating
(kVA) Rating (A) Rating (A)
(A)
10 3.15 3 -
25 5 5 -
50 10 7 -
63 10 10 -
100 16 15 -
160 31.5 20 200
6.6 kV
200 31.5 - -
300 40 - -
315 40 - 315 For Historical Proposes Only
500 63 - 315 Fuse Rating Cross Reference
630 803 - 400 EDO Fuse SMU – 20
1000 - - - Rating (A) Fuse (A)
10 3.15 3 - 3.15 3
25 3.15 3 - 5 5E. Std
50 5 5 - 8 8
63 5 5 - 10 10
100 10 10 - 16 15
160 25 15 200 25 25
11 kV 31.5 30
200 25 20 -
300 25 - - 40 40
315 25 - 315 63 65
500 40 - 315 80 80
630 63 - 400 Note 5A SMU-20 fuse is an “E”
1000 803 - 400 rated fuse not “K” to match 5K
characteristic of 5A EDO fuse.
10 3.15 3 -
25 3.15 3 -
50 3.15 3 -
63 3.15 3 -
100 5 5 -
22 kV
160 10 10 200
Including
200 10 10 -
12.7 kV
300 16 15 -
315 16 15 315
500 25 - 315
630 31.5 - 400
Note Reference only.
1000 40 - 400
For specific detail refer to Network Technical
10 3.15 - -
Manuals.
25 3.15 - -
50 3.15 - -
63 3.15 - -
100 5 - -
33 kV
160 8 - 200
Including
200 8 - -
19.1 kV
300 10 - -
315 10 - 315
500 16 - 315
630 25 - 400
1000 31.5 - 400
Date # Aug 2018
Transformer and LV Feeder
Overhead Fusing Rev # Initial
Distribution Customer Type EDO & FT
Connection Requirements Sheet # 1 of 3
Fuse Chart
EDM 435 17 326 Draw # DCCR 1-00-2
EDM 43517326 Page 14Distribution Customer Connection Requirements Third Edition January 2020
Ground Mounted HV Ring Main Unit
Historical Reference Only
Air HRC Fuses (Din 43625)
Transformer Fuse Oil HRC Fuses
Size HV Fuse LV Max Fuse Transformer Fuse
Voltage
(kVA) Rating (A) Rating (A)
100 31.5 - Size HV Fuse LV Max Fuse
Voltage
160 31.5 200 (kVA) Rating (A) Rating (A)
200 31.5 - 315 50 315
6.6 kV 315 50 315
500 80 400 6.6 kV 500 80 400
630 100 400 630 100 400
1000 160 400 1000 140 400
160 25 200 315 40 315
500 63 400
200 25 - 11 kV
630 63 400
11 kV 315 31.5 315
1000 90 400
500 40 400
315 16 315
630 50 400
500 25 400
1000 80 400 22 kV
630 31.5 400
637 10 -
1000 40 400
100 10 -
315 - -
160 10 -
500 - -
200 10 200 33 kV
630 - -
22 kV 315 16 -
1000 - -
500 25 400
630 31.5 400
1000 40 400 Historical Reference Only
1500 80 -
63 6.3 - HV Dropout and Ring Main Unit
160 6.3 - Air HRC Fuses
315 16 - Transformer
6 kV 11 kV 22 kV 33 kV
33 kV Voltage
500 20 -
HV
630 20 - HV Fuse HV Fuse HV Fuse
Transformer Size Fuse
100 40 - Rating Rating Rating
kVA Rating
(A) (A) (A)
(A)
2 X 630 160 4/6 63 -
Not applicable
2 X 500 80 40 31.5
2 X 315 540 25 16
1 X 315 + 1 X 630 80 40 -
1 X 315 + 1 X 500 63 31.5 25
1 X 500 + 1 X 630 160 4/6 63 -
Notes -
For reference only. For specific detail refer to Network Technical Manuals.
1. HV fuse sizes are the minimum required to ensure non operation of fuses for transformer energisation etc.
2. LV fuse sizes are the maximum which can be used for LV circuits to ensure grading with the transformer HV fuse .
Smaller LV may be used.
3. Where 80A dropout fuses are to be used (eg 630kVA Tx at 6.6kV or 1MVA Tx at 11kV) use K-mate current limiter in series.
4. Dropout fuses are not suitable for 1MVA Tx at 6.6kV. A fuseswitch unit must be used.
5. Piggybacking of transformers is not permissible.
6. Low loss fuses with a rating of 3/7.2 kV are to be used at 6kV to alleviate thermal compatibility problems between switchgear
and fuses.
7. Applies to single or string of up to five 22kV, 63kVA 3ph transformers
Date # Aug 2018
Transformer and LV Feeder
Ground Mounted Fusing Rev # Initial
Distribution Customer Type Air HRC
Connection Requirements Sheet # 2 of 3
Fuse Chart
EDM 435 17 326 Draw # DCCR 1-00-3
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Overhead Fusing – Isolation Transformer Source Side Fusing
Expulsion
Transformer Source Side Load Side Fault
Drop Out
Size kVA Voltage (kV) Voltage (kV) Tamer (A)
Fuse (A)
50 19.1 12.7 3.15 -
63 19.1 12.7 5 -
63 22 12.7 5 5
200 22 12.7 16 15
200 33 12.7 16 -
200 33 19.1 16 -
315 22 12.7 25
Ring Main Unit Fusing – Isolation Transformer Source Side Fusing
Transformer Source Side Load Side Expulsion Drop Out
Size kVA Voltage (kV) Voltage (kV) Fuse (A)
50 19.1 12.7 3.15
63 19.1 12.7 5
63 22 12.7 5
200 22 12.7 16
200 33 12.7 16
200 33 19.1 16
315 22 12.7 25
Note Reference only. For specific detail refer to Network Technical Manuals.
Date # Aug 2018
Isolation Transformer
Overhead and RMU Fusing Rev # Initial
Distribution Customer Type EDO, FT and Air HRC
Connection Requirements Sheet # 3 of 3
Fuse Chart
EDM 435 17 326 Draw # DCCR 1-00-4
EDM 43517326 Page 16Distribution Customer Connection Requirements Third Edition January 2020
8.1.5 LV District substations
To Transformer
HV Fuse
Network
Transformer
Network
2000A LV Koisk or Frame
A
MD Transformer
Disconnect
Indicative street
circuit arrangement
Other
street circuits
LU11 Uni-Pillar
Cable Fuse
120mm2 - 200 Amp PoS * Customer connections may be via a block, link or fuse.
185mm2 - 315 Amp
240mm2 - 315 Amp *
LU10 Mini Pillar
PoS
- Permitted maximum size consumer mains:
- All 100 Amps
UMS
LU10, LU34, LU52, & UM04 - LU10, LU11, LU34 & LU52 is 1 x 35mm2 cables / phase
Connected via 25mm2 from the street circuit
LU52 Service Pit - All > 100 Amps
LU11 - LU11 is 1 X 185mm2 cables / phase
Connected street circuit up to a max 240mm2 PoS - LU35 is 1 x 120mm2 cables / phase
LU35 UMS - UMS loads up to 20 Amps
Connected via 120mm2 from the street circuit - LU10, LU1, LU52, UM01 & UM04 is 1 x 16mm2 / phase
UM 01/04 UMS
UM01 PoS - Metering arrangements refer to the WADCM
Connected via 16mm2 from street circuit
- Customer capacity limits refer to the NIG & WADCM
LU34 Wall Box
PoS
LU35 Wall Box
PoS
Notes - Refer to DCCR 1-05-1N
Note 9
Network Customer
Date # Jan 2020
District Substation Rev # Initial
Distribution Customer LV Loads below 315A
Connection Requirements Sheet # 1 of 3
Shared LV Street Circuit
EDM 435 17 326 Draw # DCCR 1-05-1
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Page 17 of 78Distribution Customer Connection Requirements Third Edition January 2020
Notes DCCR 1-05-1N
Table 1
Network SPD
Max Load (A) Max Generation (A) Max SPD Network
Connection Type
at PoS at PoS Size Connection Fuse
Asset (Notes 1, 4 & 5)
Hosting
100 Fuse 100 N/A
Capacity ≤ 30 %
LU10 & LU52
UMS 20 Not permitted Fuse 20 20
Hosting
LU34 100 Fuse 100 N/A
Capacity ≤ 30 %
LU11 101 - 250 CB N/A 315 (max) (Note 3)
Subject to
technical review
LU35 150 (Note 2) CB N/A 200
UM 01 & UM 04 20 Not permitted Fuse 20 20
Subject to
LU44 101 - 250 CB N/A 315 (max) (Note 3)
technical review
Table 2
Transformer Max Street Circuit Max Demand on a Shared
Size (kVA) Fuse Size (A) Feeder (A)
160 200 200 (Note 8)
315 315 315
500 315 315 (Note 6 and 7)
630 315 315 (Note 6)
1000 315 315 (Note 6)
Tables 1 & 2 Notes:
1. CB denotes fault limiting circuit breaker in accordance with AS/NZS 3000:2018 2.5.4.2 item (a).
2. 200A permitted in the CBD
3. A smaller connection fuse may be used for loads less than the maximum.
4. CT metering is required for loads above 100A.
5. Fault rating of the protection device shall be in accordance the WAER, Technical Rules and WADCM.
Unless stated otherwise the minimum rating shall be 25kA.
6. 400A fuse may be used in commercial / industry areas only. Maximum demand on a shared feeder
remains at 315A.
7. For 500kVA transformers 400A fuses are not permitted if HV fuses are expulsion drop out type.
Note For specific detail refer to engineering requirements.
8. 160kVA transformers are no longer available for new connections.
9. Drawings to be read in conjunction with applicable Legislation, Industry Standards, Codes, including the
WAER and WADCM.
Date # Aug 2019
Drawing Notes Rev # Initial
Distribution Customer
for
Connection Requirements Sheet # 3 of 3
DCCR 1-05-1
EDM 435 17 326 Draw # DCCR 1-05-1N
EDM 43517326 Page 18Distribution Customer Connection Requirements Third Edition January 2020
To transformer
HV Fuse Network
Network
Transformer
A
MD
Transformer - Dedicated street circuits maximum cable size 240mm2
Ganged LV Frame
Transformer - LU11 fitted with 400A links (LU36)
2000A FSD Indicative circuit
arrangement - LU35 jointed to street circuit via 4 core 120mm2 CU cable
ERG Network - LU 35 may be fitted with fuses or links
910A Connection
FSD Fuses
- * Connection via link or fuse as determined by WP.
- Metering arrangements refer to the WADCM
G Other
Emergency LV Street
Circuits PoS
*
Response
Generator Consumer mains cable
Note 1 LU11 Max Size: 1 X 185 mm2
LU35 Max Size: 1 X 120 mm2
LU11 Uni-Pillar
Notes 7 &11
PoS * Customer LV
Switchboard SPD Notes 3 & 5
Note 4 kWH
LU35 Wall Box
Main Switch
Notes 9 & 10
GMS
Customer
Note 12 MTL MTG
Notes - Refer to DCCR 1-05-N
Transformer Transformer Max Street Max. Customer Customer Max Max. ERG
LU35
Size (kVA) FSD Fuse (A) Circuit Fuse (A) Load A / Ø LU11 Total Generation Fuse Size (A)
160 (Note 11) NA 200 150 150 NA
315 2 x 250 315 250 200 630
500 (from DOF) Subject to technical
315 250 200
(Note 11) review
NA NA
500 (from RMU)
400 315 200
(Note 11)
630 2 x 400 400 315 200 630
Date # Aug 2019
District Substation Rev # Initial
Distribution Customer MPS LV Loads up to 315A
Connection Requirements Sheet # 1 of 1
Dedicated LV Street Circuit
EDM 435 17 326 Draw # DCCR 1-05-2
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Page 19 of 78Distribution Customer Connection Requirements Third Edition January 2020
To Transformer
HV Fuse
Network
Transformer
Note 8
LV Street Circuits
Network
2000A LV Koisk
A
MD Transformer
Disconnect Indicative street
circuit arrangement
Warning label
2 x LV Fuse Switch
Network PARALLEL SUPPLY ISOLATE
To be labelled
Circuit Fuses LOAD BEFORE OPERATING
Note 8
Note: LV 2 x 240mm2 street mains not to exceed 245m
route length from the transformer to the LV kiosk.
LV Kiosk
Warning label Fuse Switch (Ganged and labelled)
PARALLEL SUPPLY Note: Where fuses are not required
ISOLATE GANGED SWITCHES. replace with switch disconnect.
Network
PoS
Notes 2 & 8
Customer LV
Consumer mains cable
Switchboard Customer
Max Size: 4 x 400mm2
Note 2
SPD Notes 1, 3, 5 & 6 Note 12
Note 4 kWH
Main Switch
Notes 9 & 10
GMS
MTL MTG
Notes - Refer to DCCR 1-05-N
Voltage 6kV 11kV 11kV 22kV 22kV
HV Fuse
AIR HRC DOF AIR HRC DOF AIR HRC
Type
Network Connection LV
2 x 400 2 x 315 2 x 400 2 x 315 2 x 400
Fuse Size
Customer:
630 500 630 500 630
Total Max Load (A)
Customer: Total Max
Subject to technical review
Generation
Date # Jan 2020
District Substation Rev # Initial
Distribution Customer Non - MPS LV Loads up to 630A
Connection Requirements Sheet # 1 of 1
Dedicated LV Circuit
EDM 435 17 326 Draw # DCCR 1-05-3
EDM 43517326 Page 20Distribution Customer Connection Requirements Third Edition January 2020
To Transformer
HV Fuse
Network
Transformer LV Street Circuits
Network
2000A LV Kiosk
A Transformer Indicative street
MD Disconnect circuit arrangement
Network Connection
Fuse switch Network
PoS
Consumer mains cable
Max Size: 4 x 400mm2 Customer LV
Switchboard Customer
Note 2 SPD Notes 1, 3, 5 & 6
Note 12
Note 4 kWH
Main Switch
Notes 9 & 10
GMS
MTL MTG
Notes - Refer to DCCR 1-05-N
Transformer Customer Fuse (A) Customer Max Total Customer: Max Total
Size (kVA) Note 1 Load (A/Phase) Generation
315 600 415 (Tx Rating)
500 (Note 11) 600 600
500 (Note 11 ) Non MPS-1600 655 (Tx Rating)
Subject to technical
630 600 600
review
630 Non MPS-1600 825 (Tx Rating)
1000 600 600
1000 1600 1310 (Tx Rating)
Note 1. W here fusesare not required replace with switch disconnect.
Date # Jan 2020
District Substation Rev # Initial
Distribution Customer Non MPS LV Loads up to 1310A
Connection Requirements Sheet # 1 of 1
Dedicated LV Street Circuit
EDM 435 17 326 Draw# DCCR 1-05-4
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Page 21 of 78Distribution Customer Connection Requirements Third Edition January 2020
To Transformer To Transformer
HV Fuse HV Fuse
Network Network
Transformer LV Street Circuits Transformer
Network
Kiosk
A 2000A A 2000A
Note 2
MD Transformer MD Transformer
Disconnect Disconnect
Indicative street
Network Connection
circuit arrangement
Disconnect 2000A Network
PoS
Consumer mains cable Customer LV
Customer
Max Size: Switchboard
Note 2 Note 12
SPD Notes 1, 3b, 5b & 6
Disconnector
- 4 x 400mm2 Max
Note 4 kWH
Main Switch
Notes 9 & 10
GMS
MTL MTG
Notes - Refer to DCCR 1-05-N
Transformer Customer Disconnect (A) Max. Customer Customer:
Size (kVA) Load (A/Phase) Max Total Generation
2 x 630 2000 1655 Subject to technical
2 x 1000 2000 2000 review
Date # Jan 2020
District Substation Rev # Initial
Distribution Customer Non MPS LV Loads up to 2000A
Connection Requirements Sheet # 1 of 1
Dedicated LV Street Circuits
EDM 435 17 326 Draw# DCCR 1-05-5
EDM 43517326 Page 22Distribution Customer Connection Requirements Third Edition January 2020
Notes DCCR 1-05-N
1. The customer’s point of supply (POS) shall be:
a. Pillar, or wall box;
b. The LV terminals for connections to a District LV frame or kiosk; or
c. The transformer terminals for connections to a Sole Use transformer rated above 160kVA up to
1MVA
2. The customer’s switchboard shall be contiguous with the substation/kiosk.
3. Fault rating of the protection device shall be in accordance with the WAER, Technical Rules, WADCM; and
for:
a. Single transformer connections 160kVA and above the SPD shall be minimum of 25kA; and
b. Multiple transformer connections the SPD shall have a minimum rating of 50kA.
4. CT LV metering is required for loads greater than 100A. Loads equal to or less than 100A shall be direct
metered.
5. SPD denotes service protection device. CB must grade with the:
a. Network connection fuse.
b. Network transformer HV fuse.
6. SPD/TX isolation device shall be tested by the electrical contractor to Western Power’s agreed settings.
7. For customer connections exceeding 200A this arrangement is applicable only when it is not possible to
install a transformer on the customer’s property and the existing nearby transformer does not have the
necessary spare capacity to meet the customer’s requirements.
8. This arrangement is only applicable for 1000kVA transformers and is limited to heritage buildings where it
is not possible to provide a substation site.
9. Customer may have more than one main switch as per WAER, WADCM, AS/NZS 3000 and AS/NZS 4777.
10. CB shown as main switch (es) – for illustration purposes only.
11. 160 and 500kVA transformers are no longer available for new connections.
12. Drawings to be read in conjunction with applicable Legislation, Industry Standards, Codes, including the
WAER and WADCM.
Date # Aug 2018
Drawing Notes Rev # Initial
Distribution Customer
for
Connection Requirements Sheet # 1 of 1
DCCR 1-05-2 to 1-05-5
EDM 435 17 326 Draw # DCCR 1-05-N
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Page 23 of 78Distribution Customer Connection Requirements Third Edition January 2020
8.1.6 LV Sole use connections
Network
Substation Transformer
HV Fuse
Network
25/63 kVA
Transformer
Consumer mains cable 100A Max
Max Size: 35mm2 / Phase
PoS Note 1 Network
Customer LV
Switchboard SPD/MPD Notes 3 & 6
Note 2 Customer
kWH Meter Note 14
Main Switch
Notes 8 & 11
GMS
MTL MTG
Notes - Refer to DCCR 1-06-N
Transformer Max Customer Consumer Mains Maximum Total
Voltage
Size (kVA) Load (A/Phase) Max mm2 / Phase Generation
240 100 1 x 35
25
480 50 1 x 35 Subject to technical
25 (Note 12) 32 1 x 35 review
415
63 82.5 1 x 35
Date # Aug 2018
Sole Use Substation
LV Loads up to 82A 3Ø Rev # Initial
Distribution Customer
Connection Requirements Underground Sheet # 1 of 1
Dedicated Transformer
EDM 435 17 326 Draw # DCCR 1-06-2
EDM 43517326 Page 24Distribution Customer Connection Requirements Third Edition January 2020
Network
Substation
Transformer
HV Fuse
Network
Transformer
Consumer
Network
mains
PoS Note 1
Customer LV
Switchboard SPD / TX Customer
Notes 2 & 14 Isolation
Note 14
Device
Isolation Switch
Metering kWH (withdrawable CB)
Note 4
(Trip Settings to be
approved by WP)
Notes 3, 6 & 7
Main Switch
Notes 10 & 11
GMS
MTL MTG
Notes - Refer to DCCR 1-06-N
Transformer Max. Customer Consumer Mains Customer: Max Total
Size (kVA) Load (A/Phase) Cable mm 2 / Phase Generation
160 Historical reference
315 415 2 x 630
500 (Note 12) Historical reference Subject to technical review
630 825 2 x 630
1000 1310 3 x 630
Note. Permissible n umber and size of consumer mains cables connected to each transform er
terminal is manufacturer dependant. Refer to engineering requirements for specific detail.
Date # Aug 2019
Sole Use Substation
LV Loads up to 1310A 3Ø Rev # Initial
Distribution Customer
Connection Requirements Underground Sheet # 1 of 1
Dedicated Transformer
EDM 435 17 326 Draw # DCCR 1-06-3
Uncontrolled document when printed
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Page 25 of 78Distribution Customer Connection Requirements Third Edition January 2020
Network
Substation
Transformer
HV Fuses
Network
Transformers
Consumer Mains
PoS Network
(Note 1 )
Customer LV
Switchboard SPD /TX Isolation Switches Customer
Notes 2 & 14 (withdrawable CBs)
Note 14
(Trip settings to be approved by WP)
Notes 3b, 6, 7 & 9
PCC
kWH Metering
Note 4
Main Switch
Notes 10 & 11
GMS
MTL MTG
Notes - Refer to DCCR 1-06-N
Transformer Max. Customer Consumer Mains Max Customer: Max Total
Size (kVA) Load (A/Phase) mm2 /Phase /TX Generation
2 X 630 1655 2 x 630 Subject to technical
2 X 1000 2625 3 x 630 review
Date # Aug 2018
Sole Use Substation
LV Load up to 2625A 3Ø Rev # Initial
Distribution Customer
Connection Requirements Underground Sheet # 1 of 1
Dedicated Transformers
EDM 435 17 326 Draw # DCCR 1-06-4
EDM 43517326 Page 26Distribution Customer Connection Requirements Third Edition January 2020
Fire
Segregation
Network Network
Substation Transformer Substation Transformer
HV Fuses HV Fuses
Network Network
Network
Transformers Transformers
Consumer Mains Consumer Mains
PoS PoS
Note 1 Note 1
Customer LV Customer LV
Switchboard Switchboard
Note 14 Customer
Notes 2, & 14 SPD /TX Isolation Switches Notes 2 & 14 SPD /TX Isolation Switches
(withdrawable CBs) (withdrawable CBs)
(Trip settings to be approved by WP) (Trip settings to be approved by WP)
(Notes 3b, 6,7, 9 & 13) (Notes 3b, 6, 7, 9 & 13)
Metering Metering
kWH kWH
Notes 4 & 5 Notes 4 & 5
Main Switch MS GMS Main Switch MS GMS
Notes 10 & 11 Notes 10 & 11
MTL MTG MTL MTG
Fire
Segregation
Notes - Refer to DCCR 1-06-N
Transformer Max. Customer Consumer Mains Max Customer: Max Total
Size (kVA) Load (A/Phase) mm2 /Phase /TX Generation
2 X 630 1655 2 x 630 Subject to technical
2 X 1000 2625 3 x 630 review
Date # Aug 2018
Sole Use Substation
LV Load up to 5250A 3Ø Rev # Initial
Distribution Customer
Connection Requirements Underground Sheet # 1 of 1
Dedicated Transformers
EDM 435 17 326 Draw # DCCR 1-06-5
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Page 27 of 78Distribution Customer Connection Requirements Third Edition January 2020
Notes DCCR 1-06-N
1. The customer’s point of supply (POS) shall be:
a. Pillar; or
b. For connections to transformers rated up to 25kVA the:
i. Customer’s mains connection box for an overhead service supply;
ii. Terminals within the pillar for a pole to pillar supply (including 2 X 25 kVA);
iii. Transformer fuse where direct connected; or
c. The bar system for connections to transformers rated at 63kVA; or
d. The LV terminals for connections to a District LV frame or kiosk; or
e. The transformer terminals for connections to a Sole Use transformer rated above 63kVA and up to
1MVA.
Note: Where there are parallel transformer connections (PoS) they shall be deemed to be a single PoS for the
purposes of determining the supply arrangement and load/generation limitations.
2. The customer’s switchboard shall be contiguous with the substation.
3. Fault rating of the protection device shall be in accordance with the WAER, Technical Rules, WADCM and for:
a. Single transformer connections 160kVA and above the SPD shall be minimum of 25kA; and
b. Multiple transformer connections the SPD shall have a minimum rating of 50kA.
4. CT LV metering is required for loads greater than 100A. Loads equal to or less than 100A shall be direct metered.
5. Commercial customers may be LV metered in 2MVA transformer groups at one combined location to allow for
future summation where required.
6. Services protection device (SPD). For sole use CT metered transformer arrangements, the SPD may also be
used as the transformer isolation device. The SPD must grade with the:
a. Network connection fuse.
b. Network transformer HV fuse.
7. SPD/TX isolation device shall be tested by the electrical contractor to Western Power’s agreed settings.
8. Customer Main Switch (MS) shall be a circuit breaker which grades with the upstream protection.
9. Overload trip on the CB must be set at 1.25 times the rated current of the transformer:
a. 630kVA – 825A;
b. 1000kVA – 1310A.
10. Customer may have more than one main switch as per WAER, WADCM, AS/NZS 3000 and AS/NZS 4777.
11. CB shown as main switch (es) – for illustration purposes only.
12. 25, 160 and 500kVA transformers are no longer available for new connections.
13. Paralleling of 2MVA transformer groups shall be prevented by mechanical interlocking.
14. Drawings to be read in conjunction with applicable Legislation, Industry Standards, Codes, including the WAER
and WADCM.
Date # Aug 2018
Drawing Notes Rev # Initial
Distribution Customer
for
Connection Requirements Sheet # 1 of 1
DCCR 1-06-2 to 1-06-5
EDM 435 17 326 Draw # DCCR 1-06-N
EDM 43517326 Page 28Distribution Customer Connection Requirements Third Edition January 2020
8.1.7 HV Connected customer owned substations
Note 14
Network Customer
Recloser pole must be a strain structure
May be UG or OH at any length
Disconnector Metering Disconnector
HV Aerial Transformer
Feeder
Notes 1 & 3 Note 2
PoS
Main switch recloser
Metering Unit set to one shot.
Notes 6 & 7
kWH
LV SMSB
Main Switch
Notes 6 & 12
MS
HV SPUR line with overhead metering arrangement – (4 MVA maximum Rural areas only)
Notes 11 & 12
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation Rev # Initial
Distribution Customer
Connection Requirements HV Metering
Sheet # 1 of 2
Overhead Pole Mounted Outdoor
EDM 435 17 326 Draw # DCCR 1-07-1a
Uncontrolled document when printed
Refer to DM for current version EDM 43517326
Page 29 of 78Distribution Customer Connection Requirements Third Edition January 2020
Note 14
Network Customer
Notes 2, 4 & 5 Main Switch Notes 6 & 7
Disconnector Metering Disconnector RMU
HV Aerial Transformer
Feeder
Notes 1 & 3 Note 2
PoS
Metering Unit
kWH
LV SMSB
Main Switch
Notes 6 & 12
HV SPUR line with overhead metering arrangement – (4MVA maximum Rural areas only) MS
Customer ground mounted equipment (Alternative arrangement)
Notes 11 & 12
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation Rev # Initial
Distribution Customer
Connection Requirements HV Metering
Sheet # 2 of 2
Ground Mounted Outdoor
EDM 435 17 326 Draw # DCCR 1-07-1b
EDM 43517326 Page 30Distribution Customer Connection Requirements Third Edition January 2020
Ringmain Unit
Network equipment, located on
the front boundary.
Refer to design note 2 (Section 9)
HV cables to
street Note 1 Isolators
HV ground outdoor metering arrangement – for loads < 4MVA
Isolator
Metering Unit
Network
kWH
PoS
HV MSB
Notes 4 & 5
LV SMSB
HV Main
Customer Switch
Note 9
Note 14 Notes 6 & 8
Load
Customer 4 way RMU
Notes 11 & 12
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation Rev # Initial
Distribution Customer
Connection Requirements HV Metering
Sheet # 1 of 1
Ground Mounted Outdoor
EDM 435 17 326 Draw # DCCR 1-07-2
Uncontrolled document when printed
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Page 31 of 78Distribution Customer Connection Requirements Third Edition January 2020
HV cables to
street Note 1 Isolators
Metering
Unit Switchroom, located on the front boundary.
kWH Room designed and constructed by the customer
in consultation with Western Power.
Network
Isolator PoS
Notes 4 & 5
HV MSB
LV SMSB
HV Main
Switch
Notes 6 & 7 Note 9
Load
Customer
Note 14
Customer RMU
Notes 11 & 12
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation Rev # Initial
Distribution Customer
Connection Requirements HV Metering
Sheet # 1 of 1
Ground Mounted Indoor (Cable Connected)
EDM 435 17 326 Draw # DCCR 1-07-3
EDM 43517326 Page 32Distribution Customer Connection Requirements Third Edition January 2020
HV cables to
street Note 1 Isolators
Metering Switchroom, located on the front boundary.
Unit
Room designed and constructed by the customer
kWH in consultation with Western Power.
Network Isolator PoS
Notes 4 & 5
HV MSB
HV Main Switch
Notes
6, 8, 10 & 11
CPS
Customer
Note 14
Customer LV
Supply
LV DB
GMS
G G G
Notes 11 & 12
Load
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation Rev # Initial
Distribution Customer
Connection Requirements HV Metering
Sheet # 1 of 1
Ground Mounted Indoor (with generation)
EDM 435 17 326 Draw # DCCS 1-07-4
Uncontrolled document when printed
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Page 33 of 78Distribution Customer Connection Requirements Third Edition January 2020
Switchroom, located at front boundary.
Room designed and constructed by the customer
in consultation with WP.
HV cables to
Isolators
street Note 1
Metering
Unit
kWH
Network Isolator PoS
Notes 4 & 5
HV MSB
HV Main Switch
Notes
6, 8, 10 & 11
CPS
Customer
Note 14
Customer LV
Supply
LV SMSB
GMS
G G G Notes 11 & 12 Load
Notes - Refer to DCCR 1-07-N
Date # Aug 2018
Customer Owned Substation
Rev # Initial
Distribution Customer HV Metering
Connection Requirements Ground Mounted Indoor (with generation) Sheet # 1 of 1
(alternative arrangement)
EDM 435 17 326 Draw # DCCR 1-07-5
EDM 43517326 Page 34Distribution Customer Connection Requirements Third Edition January 2020
Notes DCCR 1-07-N
1. Network connection shall be selected from DCCR Section 9, based on the:
a. Available overhead/underground distribution network and associated nominated supply voltage; and
b. Customers agreed maximum demand and allocated aggregate capacity of the customer generation
capacity at the point of supply.
2. Western Power assets shall be located within 30m of the property boundary. Refer to the WADCM.
3. Installation of Western Power overhead assets inside a customer's property shall comply with:
EDM #238 82 505 “New distribution overhead constructions or upgrading distribution overhead assets inside
properties.”
4. Western Power cable:
a. Supplied by Western Power. 240 mm2 XLPE copper - 1 core per phase.
b. The customer is responsible for the cable termination kit and connection to their equipment.
5. Cable shall be as short as possible, and mechanically protected. Customer shall provide spare ducts in
accordance with the WADCM. Refer to DCCR design note 2. (Section 9)
6. Customer protection system shall comply with the WAER, WADCM and the Technical Rules.
7. Customer main switch may be a circuit breaker or fuse switch.
8. Customer's main switch shall be a circuit breaker.
9. Where a customer’s main switch is a circuit breaker, the customer may have a circuit breakers or multiple fuse
switches for transformer protection. Note fuse switches shall only be used where the transformer is ≤ 1.5MVA.
10. Refer to EDM # 324 19 002 “User guide for connection of embedded generators from 30kVA up to 10MW.”
11. Customer may have more than one main switch as per WAER, WADCM, AS/NZS 3000 and AS/NZS 4777.
12. CB shown as main switch (es) – for illustration purposes only
13. Neutral voltage displacement (NVD) protection:
a. For HV connected customers, NVD protection is required where generation/storage systems are
installed. Refer to the Technical Rules for specific requirements.
14. Drawings to be read in conjunction with applicable Legislation, Industry Standards, Codes, including the WAER
and WADCM.
Date # Jan 2020
Drawing Notes Rev # Initial
Distribution Customer
for
Connection Requirements Sheet # 1 of 1
DCCR 1-07-1 to 1-07-5
EDM 435 17 326 Draw # DCCR 1-07-N
Uncontrolled document when printed
Refer to DM for current version EDM 43517326
Page 35 of 78Distribution Customer Connection Requirements Third Edition January 2020
9. HV Network arrangements
9.1 Planning philosophies
The HV network arrangements shown in this section of the requirements are based on the following
philosophies:
9.1.1 General
For all voltages the nominal maximum feeder load is defined as 390A for a first contingency outage. Given
that the nominal maximum load under normal planning conditions is deemed to be 325A, the maximum
permissible operational limit for feeder loads shall be calculated at 80%. (260A). to add with load restoration
in the event of an unplanned event.
Note that other feeder loads (and hence HV network arrangements) may be possible if alternative designs
are used – e.g. duplicate feeder cables. However, these are not reflected in this document.
9.1.2 6.6 KV philosophy
Elements of the SWIN retain a 6.6 kV HV distribution network and associated connection and supply
arrangements. Shared feeders with these networks are not based on a ‘Y’ configuration philosophy. The
maximum permissible loading on a shared feeder is 260A or 3MVA.
Arrangements are based on limiting the maximum discrete load on a feeder to 2MVA, leaving 1MVA available
for other loads. In practice, the designer will need to review specific situations and vary the load ranges for
a particular arrangement taking into account existing and potential loads.
This philosophy results in the following arrangements:
a) Discrete loads up to 2MVA - The load can be supplied from a single shared feeder.
b) Discrete loads above 2MVA up to 4MVA - The load must be evenly split across two switchboards (with
a maximum of 2MVA per switchboard). Each switchboard can be supplied from a separate shared
feeder, with a normally open point between the switchboards (i.e., two feeders operating radially).
Note that discrete loads above 2MVA up to 4.5MVA could also be supplied from a dedicated feeder,
however, this arrangement is not shown.
c) Discrete loads above 4MVA - Such loads must be assessed on an individual basis.
Note that the arrangements shown for 6.6kV are suitable for future conversion to 22kV based on the
‘Y’ configuration.
9.1.3 11 KV philosophy
The 11kV HV network arrangement for shared feeders is not based on ‘Y’ configuration.
The maximum permissible loading on a shared feeder is 260A or 5MVA. Arrangements are based on limiting
the maximum discrete load on a feeder to 4MVA, leaving 1MVA available for other loads. In practice, the
designer will need to review specific situations and vary the load ranges for a particular arrangement taking
into account existing and potential loads.
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